Dynamo-electric machinery.



No 775,857. PATENTED NOV. 22, 1904 H. G. REIST.

DYNAMO ELECTRIC MACHINERY.

APPLICATION FILED MAY 18,1903.

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NO. 775,857. Patented November 22, 1904.

UNITED STATES PATENT OFFICE.

HENRY G. REIST, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRICCOMPANY, A CORPORATION NEW YORK.

DYNAMO-ELECTRIC MACHIN ERY.

SPECIFICATION forming part of Letters Patent No. 775,857, dated November22, 1904.

Original application filed May 9, 1902, Serial No. 106,573. Divided andthis application filed May 18, 1903. Serial No. 157,556.

(No model.)

To all whom it may concern. serve to connect the sleeve 3 with the ringBe it known that I, HENRY G. REIs'r, a citilike member 4 and, as hasbeen before menzen of the United States, residing at Schcnectioned, arecast integral with the sleeve and tady, county of Schenectady, State ofNew the ring-like member.

5 York,haveinvented certain new and usefulIm- The shaft of the exciteris represented at 8 Y provements in Dynamo-Electric Machinery, and iscarried in bearings mounted in the re- (division of my priorapplication, Serial No. spective ends of the cylindrical member 3.106,573, filed May 9, 1902,) of which the fol- The main bearing isrepresented at 9 and is lowing is a specification. separable from thesleeve 3 and is held in po- 10 My present invention relates to certainimsition by bolts or other securing means, one

provements in theconstruction and mounting of which bolts is representedat 10. The supof dynamo-electric machines, the novel fcaport for theother or outer bearing of the tures of which are particularly pointedout shaft 8 is formed integral with the sleeve 3 in the appended claims.The invention is caand is represented at 11.

15 pable of various applications, but is herein- The exciter-shaftcarries a pinion 12, which after set forth, for purposes ofillustration, meshes with a driving-gear 13, mounted on in connectionwith an exciter for a dynamothe main shaft 2 of the main machine. Theelectric machine of that type now commonly pinion is inclosed within thecasing supportknown in the art as a compensated alternaing theexciter-shaft, while the driving-gear 20 tor, wherein currentfromthealternator is con- 13 is similarly inclosed by means of a gearveyedeither directly or inductively to the excasing 14. citer-armature, whichcurrent thus conveyed To enable the driving-gear and its pinion operatesto varythe armature reaction of the to be adjusted relatively to eachother, the exciter in such manner as to compensate for cylinder 3 iscast so that its axis is displaced 2 5 variations of the load and powerfactor of the laterally from the axis of the shaft 8, which maingenerator or alternator. latter axis of course is central with respectto In the drawings 1 have not considered it the ring-shaped field-magnetsupport or yoke necessary to illustrate the main alternator, 4. This isrepresented perhaps best in Fig. but have shown merely one of its mainbear- 2, in which a bounding-line 15 represents the 3 ings orpilloW-blocks,in connection with which circumference of the flange 16formed on the the exciter for the alternator is mounted. cylinder 3. Thedotted circle 17, displaced Figure 1 is a view, partly in section, of aneccentrically with respect to the circumfer- 8o exciter arranged inaccordance with my inence 15, represents the outer surface of thevention on one of the pillow-blocks of the cylinder 3, while the smallcircle 18, concen- 35 main alternator. (Not shown.) Fig. 2 is a triowith the circumference 15, indicates the detail, and Fig. 3 is an endview of so much shaft 8, which, as will be seen, is of course of themachine as is represented in Fig. 1. eccentric with respect to the axisof the cylin- In Fig. 1 the pillow-block of the main alder 3. If thiscylinder be rotated slightly in ternator is represented at land the mainshaft its bearings, it is obvious that the shaft 8 4 carried by thepillow-block at 2, this shaft will rise or fall in space, as the casemay be, being represented in end view at 2 in Fig. 3. thereby permittingthe pinion 12, carried by The pillow-block is formed with a circular theshaft, to be ad j'usted to or from the driv- 9 opening directly belowthe main bearing, and ing-gear 13 by the adjusting-screws 19, as i inthis opening is mounted a hollow cylinder may be required. Aftersuitable adjustment 45 or sleeve 3. which is cast integral with but issecured the movable structure, including eccentric to the ring-shapedsupporting frame the sleeve 3 and parts carried thereby, is or yoke 4 ofthe exciter. (Represented genclamped in place by means of set-screws 19.orally at 5.) Radial arms, such as 6 and 7 The ring-shaped member 4forms the mechanical support for the field-magnet structure proper ofthe exciter, this structure consisting of a ring 20, provided with anumber of pole pieces upon which are mounted the usual field-coils, asindicated at 21 in Fig. 3. The pole-faces of the pole-piece are joinedby a ring of magnetic material 21 in order to secure a somewhat moreuniform transition of flux about the surface of the exciterarma ture.

The ring or yoke 20,carrying the pole-pieces, is adjusted within itssupporting member 4, so as to enable the pole-pieces to be adjustedaround the exciter-armature, for'purposes well understood in connectionwith this class of machine. To secure this adjustment conveniently, alug 21", connected to the yoke 20, extends downward and is arranged toengage adjusting-nuts 22 23 on a screw-threaded rod 24:, secured at oneend to the supporting-frame 4. By suitably adjusting these nuts in anobvious manner the field structure of the exciter may be adjusted aboutthe exciter-armature.

The brush-holders 25 to 28 are arranged so that those of like polarityare supported from a brush-holder yoke formed of a somewhat bow-shapedpiece of metal, such as at 29 or 30. Each brush-holder yoke ismechanically secured to but insulated from a ring 31', movable withinthe field-frame 4, and serves the double function of a mechanicalsupport for and electrical connection between brushholders of likepolarity.

\Vhat I claim as new, and desire to secure by Letters Patent of theUnited States, is-

1. The combination of a main shaft, a dyname-electric machine the shaftof which is geared to said main shaft, and a rotatablymounted supportfor said machine arranged with its axis of rotation eccentric withrespect to the shaft of said machine whereby the distance between theshafts can be varied and the angular relation between the field of saidmachine and its armature can be altered by rotating said support.

2. The combination of a dynamo-electric machine, a rotatably-mountedsupport therefor arranged with its axis of rotation eccentric withrespect to the axis of rotation of the rotating member of saiddynamo-electric machine, and means for rotating the field of saidmachine with respect to said support.

3. The combination of a main shaft, a pillow-block for said shaft, adynamo-electric machine carried by said pillow-block, gears carriedrespectively by said shaft and the rotating member of saiddynamo-electric machine, and means for adjusting said gears relativelyto each other, and means for adjusting the field of said dynamo-electricmachine angularly with respect to its armature.

at. The combination of a main shaft, a pillow-block for said shaft,a dynamo-electric machine carried by a member rotatably mounted in saidpillow-block and arranged so that its shaft is eccentric with respect tothe axis of rotation of said member, a gear carried by said main shaft,and a pinion carried by the shaft of said dynamo-electric machine andadapted to engage said gear.

5. The combination of a main shaft, a pillow-block for saidshaft,adynamo-electric machine carried by a member rotatably mounted insaid pillow-block and arranged so that its shaft is eccentric withrespect to the axis of rotation of said member, a gear carried by saidmain shaft, a pinion carried by the shaft of said dynamo-electricmachine and adapted to engage said gear, and means for adjusting thefield of said machine angularly with respect to said member,

6. In combination, the shaft of a main dynamo-electric machine, anauxiliary dynamoelectric machine provided with a shaft operativel yconnected to the first-mention ed shaft, a support for the auxiliarymachine eccentrically mounted with respect to its shaft whereby thedistance between the two shafts may be varied by rotating the support,and means allowing a rotation of the field of said auxiliary machinewith respect to its shaft and to said support.

In witness whereof .l have hereunto set my hand this 16th day of May,1903.

HENRY Gr. REIST.

\Vitnesses:

EDWARD VVILLIAMS, J12, Masons L. BYNG.

